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When 1.92 ´ 10–6 kg is divided by 6.8 ´ 102 mL, the quotient equals

A physical change occurs when a

For the reaction represented by the equation Cl2 + 2KBr ® 2KCl + Br2, calculate the percentage yield if 200. g of chlorine react with excess potassium bromide to produce 410. g of bromine.

Given the following data, calculate the energy released by the following reaction:initial temperature of 50.g of aqueous solution #1 and also of 50.g of aqueous solution #2  = 19.0oCfinal temperature after mixing the2 solutions together: 28.2oCAssume that the calorimeter has no heat loss, the density all solutions = 1.00g/mL, and that the specific heat of the resulting aqueous solution is 3.10J/goC.

The number of significant figures in the measured value 0.0320 g is

The number of significant figures in the measurement 2010 cm is

If 1 inch equals 2.54 cm, how many centimeters equal 1 yard?  hint:  1 yard = 3 ft.

Which coefficients correctly balance the formula ?

How would 0.00930 m be expressed in scientific notation?

The result of dividing 107 by 10–3 is